/Engine/Source/Runtime/NavigationSystem/Public/NavigationSystem.h
Hierarchical mode ignores QueryFilter
true if path exists
bool TestPathSync ( [FPathFindingQuery](API\Runtime\NavigationSystem\FPathFindingQuery) Query, [EPathFindingMode::Type](API\Runtime\NavigationSystem\EPathFindingMode__Type) Mode, int32 * NumVisitedNodes ) const